Linnaeus, Sp. Pl. 1: 543. 1753.
Vines 2-4(-6) m. Leaf blade: leaflets 3-7, proximal leaflets sometimes 3-foliolate, lanceolate to broadly ovate or elliptic, unlobed or 1-3-lobed, 1.5-7 cm, somewhat leathery, margins entire. Flowers: sepals 4, blue to violet or rose-violet, 1.5-4 cm, length ca. 1.2-2 times width, abaxially pubescent; stamens green; beak glabrous.
Flowering summer-fall. Roadsides, thickets and other secondary habitats; 200 m; introduced; Ont.; native to Europe.
Clematis viticella has also been reported from Quebec, New York, and Tennessee, but the reports have not been verified. It probably should be expected elsewhere.